Keyword: «diamond retention»

The structure and composition of the diamond-matrix interface of a composite diamond-containing material obtained by combining processes of the diamond grains metallization (chromium and iron) and the tungsten-cobalt matrix sintering impregnated with copper have been studied by Raman spectroscopy. It was founded that when diamond is metallized with chromium, there are no graphite-containing formations at the diamond-matrix interface. When diamond is metallized with iron at the interface, graphite is formed as separate isolated areas 1–15 µm in size.

The structure, morphology and composition of the diamond-matrix interface of a composite diamond-containing material obtained by combining processes of the diamond grains metallization (chromium and iron) and the tungsten-cobalt matrix sintering impregnated with copper have been studied by scanning electron microscopy, X-ray microanalysis, X-ray phase analysis and Raman spectroscopy. The specific productivity of diamond dressing tools based on the obtained material has been determined. Diamond metallization with chromium and iron, cause the specific productivity of the tool increase by ~44–62% compared to the same indicator of a tool without diamond metallization.

An urgent task of materials science of composites is the study of the filler-matrix boundaries. The aim of the work is analysis of the structural-phase state of the «diamond-iron-carbon matrix» interphase boundary of diamond composites obtained using explosive compacting and subsequent heating. Research methods used: optical and scanning electron microscopy, X-ray phase analysis. The formation of high-strength and wear-resistant boron and chromium carbides at the interphase boundary was revealed, which supplemented the mechanical adhesion of the chemical one, increased the diamond retention and operational properties of the experimental composites. The data obtained can be used in the development of highly effective diamond-abrasive composites with controlled properties.